Walmart says it is expanding its same-day delivery options to include early morning hours. The move comes as online retailers compete to meet consumers' growing demand for speed and convenience.

An entrance to Walmart’s 1.5-million-square-foot online fulfillment center in Lancaster. The the three-level facility has some of Walmart's highest-paying hourly jobs in the market. Juan Figueroa / ...

Charlotte is a delivery hot spot with high demand for online pickup and delivery orders, Walmart spokeswoman Allison Jones said during the behind-the-scenes look Thursday.